Leviticus 15:6

If he will have sat where that man has sat, he shall also wash his clothes, and having washed with water, he shall be unclean until evening

Other versions

King James Version

And he that sitteth on any thing whereon he sat that hath the issue shall wash his clothes, and bathe himself in water, and be unclean until the even.

English Standard Version

And whoever sits on anything on which the one with the discharge has sat shall wash his clothes and bathe himself in water and be unclean until the evening.

New International Version

Whoever sits on anything that the man with a discharge sat on must wash his clothes and bathe with water, and he will be unclean till evening.